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Installation and Maintenance Manual
E2K-401-0918 Rev. 1
6.4
MDPI and POT
Move valve to Close position. Manually rotate MDPI arrow to indicate Close. Calibration is
complete. Open valve to check that MDPI arrow goes to Open, indicating that N is correct
for full valve travel. Potentiometer, if included, has also been calibrated. Mechanical dial
travel is 270°. Approximately 5% of total resistance is left on each end of Pot for total valve
travel. 10-Turn Pot is driven 8.89 turns; 5% resistance of element is left on each end of Pot
for total travel. This may be adjusted to a specific minimum resistance value at Open or
Close by using a screwdriver in slot on 10 turn pot.
6.5
Potentiometer Only
Potentiometer shaft is rotated by grasping flats of P/N 1031 slip-clutch and turning to
desired resistance. 1-turn Pot is rotated 270° by P/N 1030 gear box.
6.6
Gear System to Field Mount MDPI
1.
2.
3.
Figure 14
P/N 7078
MDPI and Potentiometer Gear Box P/N 1030
Remove (3) P/N 7078 mounting screws holding P/N 4106 Instruction Plate to Limit
Switch Modules.
Using same (3) P/N 7078 screws, attach P/N 4118 MDPI Adapter to top of Limit
Switch Modules.
Insert MDPI Input Shaft, (P/N 9052-) making sure blade drops into slot.
Input Shaft is different length for combination of limit switches and gear boxes.
—
3 gear-2 switch uses P/N 9052-5 (0.8")
—
3 gear-4 switch uses P/N 9052-1 (1.8")
—
3 gear-5 switch uses P/N 9052-2 (2.3")
P/N 4118
P/N 9052-
Section 6: MDPI and Potentiometer Gear Box P/N 1030
September 2018
17
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